efficient manufacture of high quality tubes · continuous welding of bright tubes with an outer...

The Granlund KOW tube welding mill is speciallydesigned for manufacture of seam-welded tubes in stainlessdesigned for manufacture of seam-welded tubes in stainless

and heat-resistant alloys.Flexible. Saves material. High output. Close tolerances

Efficient manufactureof high quality tubes

KOW-1 for continuous weldingTh e standard model of the tube welding mill is intended for continuous welding of bright tubes with an outer diameter between 5 and 19 mm and a wall thickness from 0.4 to 1.2 mm. Th e equipment consists of the following main units, assembled to form a production line:1. Double strip dereeler.2. Welding device for joining strips.3. Strip accumulator4. Strip forming rolls with stands.5. TIG-welding unit with Arc stabilizer.6. Calibration rolls with stands.7. Straightening device type KRO.8. Tube cutting device.9. Tube receiving table.10. Container for cut-to length tubes.

Tube cuttingTh e cutting method used today is of the guillotine type.Before cutting, the device is accelerated up to the same speed as the tube mill. Th e tube is now cut with a corre-sponding slight deformation of the tube.Th e tube is dropped into the calibrating line where this deformation is neutralized.

FunctionTh e strip is drawn from the double strip dereeler and fed into the welding device where the ends are cut at right angles and joined by TIG-welding. Two strip coils can be welded together without stopping the tube welding mill, provided that the strip accumulator is used. Th e suffi cient amount of strip can be feed into the accumulator to be used while the strip coils are welded together.Th e strip is formed into a slotted tube by 8 pairs of forming rolls. Th e slotted tube then enters the welding box, where it is welded along the slot by means of an electric arc between itself and a tungsten electrode. Th e closed welding box is fi lled with inert gas which is also fed to the interior of the slotted tube. After welding, the tube is quenched in water and proceeds to 4 pairs of calibration rolls.

After passing a straightening device type KRO the tube proceeds through the cutting device to a receiving table. Th e cutting device is controlled by a length counter.

Saves materialTh e Kanthal method of forming tubes saves 1-1.5% of material compared to the conventional method.

RollsTh e forming of the strip as well as the calibration of the tube are operations performed by rolls with grooves which are designed for one particular tube size. At the strip form-ing stage there are two pairs of rolls made of hardened special steel and six pairs of tungsten sintered carbide. Th e four pairs of rolls in the calibration device are also made of tungsten sintered carbide.When switching from one tube size to another, all the form-ing and guiding rolls, the sealing bushings at the welding box and the guide bushings for the cut-off device, have to be changed. When switching to another wall thickness but keeping the same tube diameter only the guide rolls and the fi rst pair of forming rolls should be changed. A slight dif-ference is accepted by the rolls i. e. 0.1-0.2 mm increase or decrease in strip width.All rolls can be set vertically as well as horizontally. Th e rolls can be set an overall 0,5 mm from the normal setting giving the required tube diameter. Th is is used in order to compen-sate for wear, and thus extend the life of the rolls.

High outputTh e maximum tube welding speed depends on the type of alloy and quality of the strip. composition can have a signifi cant eff ect on the welding speed.

Close tolerancesNormal recommended tolerances for the strip are:width ±0.1 mmthickness +0/- 0.05 mm or +0.015/- 0.035 mm. Th e strips must not have a camber exceeding 1 mm/m. An ovality of the tubes of ±0.04 mm can be obtainedwith new rolls. With worn rolls the ovality will increase

Auxiliary equipmentIf black annealed tubes are required the welding mill can be supplied with high frequency annealing.To control the quality of the welding seam an Eddy current tester can be supplied.

Granlund MachineryVisiting address: Kungsgatan 90 • P.O.Box 377, SE-631 05 Eskilstuna, Sweden

Tel:+46(0)16-16 72 00 • Fax:+46(0)16-16 72 72 • [email protected] • www.granlund.se

The Granlund KOW-HD tube welding mill is speciallyThe Granlund KOW-HD tube welding mill is speciallydesigned for manufacture of seam-welded tubes in stainlessdesigned for manufacture of seam-welded tubes in stainless

and heat-resistant alloys.Flexible. Saves material. High output. Close tolerances

Efficient manufactureof high quality tubes

Granlund MachineryVisiting address: Kungsgatan 90 • P.O.Box 377, SE-631 05 Eskilstuna, Sweden

Tel:+46(0)16-16 72 00 • Fax:+46(0)16-16 72 72 • [email protected] • www.granlund.se

KOW-HD for continuous weldingTh e new model of the tube welding mill is intended for continuous welding of bright tubes with an outer diameter between 10 and 30 mm and a wall thickness from 0.8-1.5 mm. Th e equipment consists of the following main units, assembled to form a production line:

1. Double strip dereeler2. Welding device for joining strips3. Strip forming rolls with stands4. TIG-welding unit with Arc stabilizer 5. Calibration rolls with stands 6. Straightening device7. Tube cutting device8. Tube receiving table with sorting9. Container for cut-to length tubes

Tube cuttingTh e cutting method used today is of the guillotine type.Before cutting, the device is accelerated up to the same speed as the tube mill. Th e tube is now cut with a corre-sponding slight deformation of the tube.Th e tube is dropped into the calibrating line where this deformation is neutralized.

FunctionTh e strip is drawn from the double strip dereeler and fed into the mill. Th e strip is formed into a slotted tube by 14 pairs of forming rolls. Th e slotted tube then enters the welding box, where it is welded along the slot by means of an electric arc between itself and a tungsten electrode. Th e closed welding box is fi lled with inert gas which is also fed to the interior of the slotted tube. After welding, the tube is quenched in water and proceeds to 4 pairs of calibration rolls. After passing a straightening device, the tube proceeds through the cutting device to a receiving table. Th e cutting device is controlled by a length counter.

Saves materialTh e GRANLUND method of forming tubes saves 1-1.5% of material compared to the con-ventional method.

RollsTh e forming of the strip as well as the calibration of the tube are operations performed by rolls with grooves which are designed for one particular tube size.Th e forming and calibrating rolls can be supplied in hard-ened special steel or tungsten sintered carbide.When switching from one tube size to another, all the form-ing and guiding rolls, the sealing bushings at the welding box and the guide bushings for the cut-off device, have to be changed. When switching to another wall thickness but keeping the same tube diameter only the guide rolls and the fi rst pair of forming rolls should be changed. A slight dif-ference is accepted by the rolls i.e. 0.1-0.2 mm increase or decrease in strip width.All rolls can be set vertically as well as horizontally. Th e rolls can be set an overall 0.5 mm from the normal setting giving the required tube diameter. Th is is used in order to compen-sate for wear, and thus extend the life of the rolls.

High outputTh e maximum tube welding speed depends on the type of alloy and quality and thickness of the strip. Composition can have a signifi cant eff ect on the welding speed.

Close tolerancesNormal recommended tolerances for the strip are:• width ±0.1 mm• thickness +0/-0.05 mm or +0.015/-0.035 mmTh e strips must not have a camber exceeding 1 mm/m.

Auxiliary equipmentIf black annealed tubes are required the welding mill can be supplied with high frequency annealing.To control the quality of the welding seam an Eddy current tester can be supplied.

Sales Catalogue

_____________________________________________________________________________________________ This information, which may be subject to change, is offered solely for your consideration, and should not be taken as a warranty or representation for which we assume any legal responsability.

2/7/2006 4:1

4. TUBE MANUFACTURING KOW, KSA, KCH, KCT, KOG, KCL, KOS

GRANLUND Machinery offers a complete range of machines for production of seam welded tubes. These machines enables continuous welding of strip, cutting to desired length, calibrating ends and cleaning

GRANLUND KOW-HD tube welding mill “Heavy-duty”. GRANLUND KOW-M tube welding mill standard GRANLUND KSA strip accumulator GRANLUND KCH tube cutting head GRANLUND KCT tube cutting table GRANLUND KOG tube calibrating unit GRANLUND KCL tube cutting line GRANLUND KOS tube cleaning equipment

For information on straightening devices, GRANLUND KRO and KRH, see chapter 9.

Sales Catalogue


2/7/2006 4:2

KOW-HD Tube Welding line, comprising KOW-HD with accessories. The best way for element manufacturers to control the tube stock and minimize stock costs, is to produce the tubes themselves. (It is also wise to minimize the number of tube sizes.) GRANLUND offers a tube welding mill intended for continuous welding of thin walled tubes for various applications.

• fast operation • high quality of tubes • easy change of tube size • close tolerances • turn-key installation

The quality of the strip is very important (cleanliness, burrs and dimension tolerances). Construction

1. Double strip dereeler 2. Welding device for joining strip 3. Strip accumulator, type KSA (option) 4. Forming rolls with stands (14 pairs) 5. TIG welding unit with rectifier and arc stabilizer (arc stabilizer is optional) 6. Calibrating rolls with stands (4 pairs) 7. Eddy current tester (option) 8. Straightening device, type Turk´s head. 9. Tube cutting device, type KCT 10. Receiving table, type KOM-2W, and trolley, type KTT (option) 11. Calibrating and deburring unit, type KOG (option) 12. Hyperbolic straightening mill, type KRH (option)

1. Double strip dereeler Takes 500 kg on each side. It is easy to turn around when the strip ends are to be welded together. To get the right tension of the strip, simple friction brakes are used. The dereeler can take all strip widths required for the tubes to be produced in the mill. 2. Welding device for joining strip Movable and should stand at a distance of 1-1,5 m from the dereeler. The welding is done manually by means of a TIG welder. The ends are cut perpendicular (90°) to the strip side (if not, the joint may brake when formed into a tube). Argon or argon/hydrogen protection gas is used.

Sales Catalogue


2/7/2006 4:3

3. Strip accumulator, type KSA (option) This device is needed for continuous production. It provides the operator with time to weld the ends of two coils of strip together. The alternative would be to put a sufficient length of strip on the floor while the two ends are welded together. This could damage the results, e g if there is grease or oil on floor. Contaminations like these may cause holes in the tube. 4. Forming rolls with stands (14 pairs) All forming rolls, except pairs 4 and 5, for which the wear is less severe, are made of tungsten carbide as standard. Seven rolls stands are operating in vertical position and seven in horizontal. As standard, tube diameters up to appr. Ø30 x 1,5 mm can be produced. 5. TIG welding unit with rectifier and arc stabilizer (arc stabilizer is optional) The tube is protected by inert gas, both inside and outside of the tube, in the welding box. The TIG welding unit (rectifier and torch), specially designed for this machine, has a capacity of 500 A in continuous running. The machines are normally equipped with an optional arc stabilizer, Cyclomatic 70B (solenoid around electrode - ”double cyclomatic”). Stabilizer is a requirement, if higher production speeds should be reached. It works both as a stabilizer for the arc and a preheater of the strip. The stabilizer can also be used for occilation of the arc, if the strip thickness is large, or if even higher production speeds should be achieved. The welding unit is equipped with a high frequency start. The two pair of pressing rolls (water cooled) in the welding box can be adjusted during operation. The tube is water cooled directly after the welding box. 6. Calibrating rolls with stands (4 pairs) The calibrating part consist of four pair of rolls, two vertical and two horizontal. All rolls are made of tungsten carbide. An adjustment of the final diameter can be made, within certain limits (the tube diameter is kept on the plus tolerance side before calibrating). If the strip is too narrow or too wide from the start, the adjustment will be difficult, if not impossible.

Sales Catalogue


2/7/2006 4:4

7. Eddy current tester (option) Every machine, since 1974, has been equipped with and Eddy current tester for in-line testing of the tube, i e to control the quality of the welding seam (normall it only tests the weld, not the entire tube section). The device can either be used for automatic cut away of the faulty part, or automatic selection in good and bad. Standard tester is Milli Q, but we can supply other brands, e g Förster or Prüftechnik, on request. 8. Straightening device, type Turk´s head. For prestraightening of the tubes. 9. Tube cutting device, type KCT Normally, this guilliotine type cutting device is used. For bigger tube sizes, an abrasive disc (rotary cutter) or saw can be used. The advantage with the guilliotine cutter is that the burrs will be very small. No particles are left inside the tube. The life time of the blade, before sharpening is required, is very long, and many regrindings can be made. For more information on KCT, see separate sheet in this chapter. 10. Receiving table, type KOM-2W, and trolley, type KTT (option) Normally, when the welding line is equipped with the KCT cutting table, a separate receiving table is not required. In other cases, however, the line may be equipped with the KOM-2W; a two-way, sorting, receiving table equipped with wheels for easy moving. (For more information, see chapter 14.) In such a case, a separate trolley, type KTT, is used for cut tubes (4 or 6 m standard lengths). 11. Calibrating unit, type KOG (option) For information, see seperate sheet in this chapter. After passing the KOG, the tubes are ready for the filling operation. 12. Hyperbolic straightening line, type KRH (option) For very high demands on straightness and roundness, a hyperbolic straightening line, type KRH, can be supplied in line with the welding mill. For information, see chapter 9. Gas mixer (option) Required if the customer cannot find mixed gas.

Sales Catalogue


2/7/2006 4:5

Technical data Control system Mitsubishi MAC-90 PLC Total height 1600-1800 mm Total length 14-20 m (complete line), 5,7 m (welding mill only) Width appr 2500 mm Weight appr 4500 kg (complete line), 3600 kg (welding mill only) Production speed (theoretical) 5 - 20 m/min depending of wall thickness. Tube diameter max 30 mm (guilliotine cutter). Typical tolerance on tube ±0,04 mm Wall thickness min 0,5 mm max 1,5 mm. Tube length after cutting max 3000 mm (standard, longer on request) Strip coil max outer diameter = 1250 mm min inner diameter = 300 mm max inner diameter = 600 mm coilweight: max 500 kg. Electrical connection three-phase 400 V, 50/60 Hz, 120 A Air supply min 600 kPa, dry and oil-free Argon consumption 200 - 500 l/hour (we recommend 95% Ar/5% H2) Water consumption 600 - 1000 l/hour

xoperator

RIGHT VERSION

LEFT VERSION

Right and left versions available:

Required information when ordering • type of tube material

• tube diameter and wall thickness

• electrical connection

• right or left version

1 week training in Hallstahammar and 1-2 weeks installation is normally included

Sales Catalogue


2/7/2006 4:6

KOW-M Tube Welding Mill The best way for element manufacturers to control the tube stock and minimize stock costs, is to produce the tubes themselves. (It is also wise to minimize the number of tube sizes.) GRANLUND offers tube welding mills intended for continuous welding of thin walled tubes for various applications. • fast operation • high quality of tubes • easy change of tube size • close tolerances • turn-key installation The operator does not have to be a skilled welder. The quality of the strip is very important (cleanliness, burrs and dimension tolerances). Construction

1. Double strip dereeler 2. Welding device for joining strip 3. Strip accumulator, type KSA (option) 4. Forming rolls with stands (8 pairs) 5. TIG welding unit with rectifier and arc stabilizer (arc stabilizer is optional) 6. Calibrating rolls with stands (4 pairs) 7. Eddy current tester (option) 8. Straightening device, type KRO 9. Tube cutting device, type KCT 10. Receiving table, type KOM-2W, and trolley, type KTT (option) 11. Calibrating and deburring unit, type KOG (option) 12. Hyperbolic straightening mill, type KRH (option)

1. Double strip dereeler Takes 150-250 kg on each side. It is easy to turn around when the strip ends are to be welded together. To get the right tension of the strip, simple friction brakes are used. The dereeler can take all strip widths required for the tubes to be produced in the mill. 2. Welding device for joining strip Movable and should stand at a distance of 1-1,5 m from the dereeler. The welding is done manually by means of a TIG welder. The ends are cut perpendicular (90°) to the strip side (if not, the joint may brake when formed into a tube). Argon or argon/hydrogen protection gas is used.

Sales Catalogue


2/7/2006 4:7

3. Strip accumulator, type KSA (option) This device is needed for continuous production. It provides the operator with time to weld the ends of two coils of strip together. The alternative would be to put a sufficient length of strip on the floor while the two ends are welded together. This could damage the results, e g if there is grease or oil on floor. Contaminations like these may cause holes in the tube. 4. Forming rolls with stands (8 pairs) All forming rolls, except pairs 4 and 5, for which the wear is less severe, are made of tungsten carbide as standard. Five rolls stands are operating in vertical position and three in horizontal. The vertical roll stands have open shafts, which makes it easy and quick to change rolls. The shafts are prepared for support bearings (bearing box kit) when tube diameters and wall thicknesses increase. As standard, tube diameters up to appr. Ø19 x 1,0 mm can be produced. Normally, up to Ø12 mm tubes are produced. 5. TIG welding unit with rectifier and arc stabilizer (arc stabilizer is optional) The tube is protected by inert gas, both inside and outside of the tube, in the welding box. The TIG welding unit (rectifier and torch), specially designed for this machine, has a capacity of 400 A in continuous running. The machines are normally equipped with an optional arc stabilizer, Cyclomatic 70B (solenoid around electrode - ”double cyclomatic”). Stabilizer is a requirement, if higher production speeds should be reached. It works both as a stabilizer for the arc and a preheater of the strip. The stabilizer can also be used for occilation of the arc, if the strip thickness is large, or if even higher production speeds should be achieved. The welding unit is equipped with a high frequency start. The two pair of pressing rolls (water cooled) in the welding box can be adjusted during operation. The tube is water cooled directly after the welding box. 6. Calibrating rolls with stands (4 pairs) The calibrating part consist of four pair of rolls, two vertical and two horizontal. All rolls are made of tungsten carbide.The vertical roll stands have open shafts, which makes it easy and quick to change rolls. The shafts are prepared for support bearings when tube diameters and wall thicknesses increase. An adjustment of the final diameter can be made, within certain limits (the tube diameter is kept on the plus tolerance side before calibrating). If the strip is too narrow or too wide from the start, the adjustment will be difficult, if not impossible.

Sales Catalogue


2/7/2006 4:8

7. Eddy current tester (option) Every machine, since 1974, has been equipped with and Eddy current tester for in-line testing of the tube, i e to control the quality of the welding seam (normall it only tests the weld, not the entire tube section). The device can either be used for automatic cut away of the faulty part, or automatic selection in good and bad. Standard tester is Milli Q, but we can supply other brands, e g Förster or Prüftechnik, on request. 8. Straightening device, type KRO For information, see chapter 9. The drive motor is synchronized with the welding mills drive motor. 9. Tube cutting device, type KCT Normally, this guilliotine type cutting device is used. For bigger tube sizes, an abrasive disc (rotary cutter) or saw can be used. The advantage with the guilliotine cutter is that the burrs will be very small. No particles are left inside the tube. The life time of the blade, before sharpening is required, is very long, and many regrindings can be made. For more information on KCT, see separate sheet in this chapter. 10. Receiving table, type KOM-2W, and trolley, type KTT (option) Normally, when the welding line is equipped with the KCT cutting table, a separate receiving table is not required. In other cases, however, the line may be equipped with the KOM-2W; a two-way, sorting, receiving table equipped with wheels for easy moving. (For more information, see chapter 14.) In such a case, a separate trolley, type KTT, is used for cut tubes (4 or 6 m standard lengths). 11. Calibrating unit, type KOG (option) For information, see seperate sheet in this chapter. After passing the KOG, the tubes are ready for the filling operation. 12. Hyperbolic straightening line, type KRH (option) For very high demands on straightness and roundness, a hyperbolic straightening line, type KRH, can be supplied in line with the welding mill. For information, see chapter 9. Gas mixer (option) Required if the customer cannot find mixed gas.

Sales Catalogue


2/7/2006 4:9

Technical data Control system Mitsubishi MAC-50 PLC Total height 1600-1800 mm Total length 14-20 m (complete line), 4 m (welding mill only) Width appr 2500 mm Weight appr 3000 kg (complete line), 1500 kg (welding mill only) Production speed (theoretical) 0 - 16 (20) m/min Tube diameter min 4-6 mm (4 mm requires a certain wall thickness) max 19 mm (guilliotine cutter) Typical tolerance on tube ±0,04 mm Wall thickness min 0,3 mm max 1,0-1,2 mm (see below) Tube length after cutting max 3000 mm (standard, longer on request) Strip coil max outer diameter = 1250 mm min inner diameter = 300 mm max inner diameter = 600 mm Electrical connection three-phase 400 V, 50/60 Hz, 63 A Air supply min 600 kPa, dry and oil-free Argon consumption 200 - 500 l/hour (we recommend 95% Ar/5% H2) Water consumption 200 -400 l/hour For a wall thickness of 1,0 mm or thicker, we recommend double supports (option) for the bearing boxes, regardless of tube diameter. Right and left versions available:

Required information when ordering • type of tube material

• tube diameter and wall thickness


• right or left version

1 week training in Hallstahammar and 1-2 weeks installation is normally included.

Sales Catalogue


2/7/2006 4:10

KCH Cutting Head GRANLUND KCH is used for cutting thin walled tubes. It is sold separately or mounted on the Cutting Table GRANLUND KCT or the Cutting Line GRANLUND KCL. Construction KCH is a guilliotine-type of cutting device with a knife, clamps holding the tube in position and a hydraulic device. Technical data El.connection three-phase 400 V, 3000 W

Sales Catalogue


2/7/2006 4:11

KCT Cutting Table GRANLUND KCT is used for cutting thin walled tubes into desired lengths. It is meant to be placed in line with a tube welding mill and to cut the welded tubes directly into desired final lengths. It is equipped with the GRANLUND Cutting Head, KCH. KCT is often followed by a calibrating unit, GRANLUND KOG. Construction and function The cutting head, KCH, is mounted on a moving table. When the KCT gets a signal from the control system (in automatic mode) or a manual order to cut the tube, it ”hunts down” the tube and cuts it. Subsequently it is sorted by a tilting receiving table to the next operation (or sorted out as reject). An eddy current testing device detects weld faults and KCT cuts and sorts out the defective part as a reject. KCT is equipped with a control unit where the order and production parameters are set. Technical data Inquiry data

Minimum tube length vs welding speed, theoretical curve based on a cycle time for cutting

and return of 3,2 seconds.

6

8

10

12

14

16

250 500 750 1000

MIn. cut length (mm)

Welding speed (m/min)

Sales Catalogue


2/7/2006 4:12

KOG Calibrating Unit The calibrating unit comes as a natural sequence after cutting. The tubes go directly to a walking beam feeder, which feeds one end into a calibrating tool. The tool is tapered and presses out the small deformation from cutting. After calibrating one side, the tube is tranported over for calibrating the opposite end. As the cutting device is very rapid, very short lengths can be calibrated. Shortest length is 250 mm, and the longest is 3000 mm (6000 mm as option). The tubes are now ready for the filling operation. KOG is available in two versions: hydraulic (KOG-H) and pneumatic (KOG-P). The hydraulic version is suitable when heavy sizes of tubes are produced. The pneumatic version is normally suitable for production of tubes for tubular heating elements.

• clean deburring of both ends • automatic operation • can be placed in line with the tube welding mill

Technical data Height 1000 mm Length 4300 mm Width 900 mm Weight appr 600 kg Tube length min 300 mm max 3000 mm (6000 mm as option) Tube diameter min 6 mm max 12 mm Wall thickness min 0,3 mm max 1,0 mm Air supply min 6 bar (600 kPa), large flow required The cycle time is appr 3 seconds, i e appr 1200 tubes per hour.

Sales Catalogue


2/7/2006 4:13

Required information when ordering • diameter, length and wall thickness of tube


• to be used in line with a tube welding mill?

• hydraulic or pneumatic version?

Sales Catalogue


2/7/2006 4:14

KCL Cutting Line GRANLUND KCL is used for cutting standard length (precut) thin walled tubes into desired final lengths. It is, as oppposed to KCT, not meant to be placed in line with the tube welding mill, but to operate separately. Therefore, it is equipped with a magazine, storing the precut tubes. KCL is equipped with the GRANLUND Cutting Head, GRANLUND KCH. Construction and function The KCL is equipped with a PLC system and a terminal with 4x20 digits. The desired cut length is set at the control panel. The length data can be changed during operation, i e no set-up time. Too short and too long tubes are sorted out. Changing to a new tube diameter takes about 2 hours, and requires changing: • calibrating mandrels, • clamping jaws in cutting device and calibrating device, • tube holder, • guide bushings and • adjustment of slot in feeding device Technical data Tube materials mild steel, stainless steel, high temperature steel Tube diameter min 6 mm max 12 mm Wall thickness min 0,3 mm max 0,8 mm Initial tube length min 3000 mm max 6200 mm Cut length min 300 mm max 3000 mm Container width 350 mm (e g appr 35 pcs Ø10 mm tubes or 55 pcs Ø6 mm tubes) Length tolerance ±1 mm Cycle time normally 3-5 seconds per tube Max usage of tube > L-150 mm Clean cut on front end 10-50 mm Time to change to new tube length: can be made during on-going production Time to change to new tube diameter: appr 2 hours.

Sales Catalogue


2/7/2006 4:15

Capacity (only given as an indication) Example 1: 1000 mm cut tubes from 6000 mm initial tube length

Feeding plus five cuts takes 5 x 4 s + 10 s = 30 s per five tubes (6 s/tube) => 12 pcs/min or 720 pcs/h (Waste part 995 mm)

Example 2: 500 mm cut tubes from 6200 mm initial tube length

Feeding plus twelve cuts takes 12 x 3 s + 10 s = 46 s per twelve tubes (3,8 s/tube) => 15,5 pcs/min or 940 pcs/h (Waste part 188 mm)

Inquiry data

Sales Catalogue


2/7/2006 4:16

KOS Tube Cleaning Equipment After cutting and deburring, the tubes are often internally contaminated. The contamination can normally not be removed by degreasing, but requires a mechanical method. A common method is to use a rotating brush. The disadvantage with this method is the contamination of the brush, which after some time may make the tubes more dirty after the ”cleaning” operation than before. To avoid this problem, the cleaning media should be used only once. GRANLUND KOS provides an efficient cleaning of tubes by blowing plugs of expanded polyethylene (XPE).

• quick and easy cleaning • friendly to the environment • low maintenance cost

Construction and function A pneumatic tool punches out the cylindrical plugs of expanded polyethylene out of a strip, and blows these plugs through the tubes. The tube to be cleaned is guided manually into the punching tool, which is connected to compressed air. The punching is started by pressing a foot pedal. Simultaneously with the punching of the plug, there is an air pressure built up behind the plug which blows the plug through the tube removing any burrs and solid dirt which remain inside the tube. The pneumatic punch automatically feed a new plug into punching position. Technical data Height x Width x Length 1050 x 320 x 600 mm Weight 75 kg Tube outer diameter max 13 mm (KOS-13) max 19 mm (KOS-19) Production rate 25-40 tubes/minute Air pressure 6 atm Air consumption 0,2 l/stroke

Sales Catalogue


2/7/2006 4:17

Required information when ordering • outer and inner diameter of tube

efficient manufacture of high quality tubes · continuous welding of bright tubes with an outer...

Documents